Information kindly provided by Statistics New Zealand and the New Zealand Police

Gender differentiation in criminal court outcomes
In New Zealand, governmental/official crime statistics show that women are less likely than men to be convicted of an offence or sentenced to imprisonment, and receive shorter terms than men and are more likely to be granted early release on parole.

Crime Statistics - Released June 1998
Recorded crime in 1997 dropped almost one percent and police solved slightly more crime than in1996. These statistics show recorded crime dropped by 4,049 offences to 473,547. Police also resolved 176,299 offences, an increase from 36.8% to 37.2%.